{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "e98a8e00",
   "metadata": {},
   "source": [
    "## 本周内容\n",
    "\n",
    ">0. 代码的注释\n",
    ">1. 用户输入\n",
    ">2. 格式化输出"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fb00ec26",
   "metadata": {},
   "source": [
    "## 0.代码的注释\n",
    "\n",
    ">1. #，一般写在代码块的最上边，或者每一行代码的最后，用于代码思路的记录。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "12fb1239",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Author:Zhou Yichen"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d6dcaede",
   "metadata": {},
   "source": [
    ">2. '''注释内容'''，一般是注释代码块"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "aa4e91e6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "三个引号注释代码块内容，不运行\n"
     ]
    }
   ],
   "source": [
    "'''\n",
    "import random\n",
    "wait_time = random.randint(1,60)\n",
    "print(wait_time)\n",
    "\n",
    "word = \"bottles\"\n",
    "print(word)\n",
    "'''\n",
    "print(\"三个引号注释代码块内容，不运行\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "71840edc",
   "metadata": {},
   "source": [
    "## 1.用户输入\n",
    "\n",
    ">1. input()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "e888f573",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:admin\n",
      "密码:123456\n",
      "admin\n",
      "123456\n"
     ]
    }
   ],
   "source": [
    "# 登陆系统\n",
    "username = input(\"账号:\")\n",
    "password = input(\"密码:\")\n",
    "\n",
    "print(username)\n",
    "print(password)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "9fe9cc36",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:admin\n",
      "密码:123456\n",
      "欢迎admin登录！\n"
     ]
    }
   ],
   "source": [
    "# 登陆系统 迭代1：增加判断功能\n",
    "# 假设我们数据库有用户信息：账号：admin，密码，123456\n",
    "user1 = \"admin\"\n",
    "password1 = \"123456\"\n",
    "\n",
    "username = input(\"账号:\")\n",
    "password = input(\"密码:\")\n",
    "\n",
    "# 情景一：输入信息正确，登陆成功\n",
    "if user1 == username and password1 == password:\n",
    "    print(\"欢迎\"+user1+\"登录！\")\n",
    "# 情景二；账号不存在或密码不正确\n",
    "else:\n",
    "    print(\"账号不存在或密码不正确\")\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "667b2898",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:ded\n",
      "密码:dedede\n",
      "账号不存在或密码不正确\n",
      "您还有2次尝试的机会\n",
      "账号:efdt\n",
      "密码:gert\n",
      "账号不存在或密码不正确\n",
      "您还有1次尝试的机会\n",
      "账号:etgh\n",
      "密码:reth5y\n",
      "三次输入失败，请1小时后再来尝试\n"
     ]
    }
   ],
   "source": [
    "# 登陆系统 迭代2：增加循环功能\n",
    "# 假设我们数据库有用户信息：账号：admin，密码，123456\n",
    "user1 = \"admin\"\n",
    "password1 = \"123456\"\n",
    "\n",
    "for i in range(3,0,-1):   # i 是一个int\n",
    "    username = input(\"账号:\")\n",
    "    password = input(\"密码:\")\n",
    "\n",
    "    # 情景一：输入信息正确，登陆成功\n",
    "    if user1 == username and password1 == password:\n",
    "        print(\"欢迎\"+user1+\"登录！\")\n",
    "        break # 终止循环\n",
    "    # 情景二；账号不存在或密码不正确\n",
    "    else:\n",
    "        if i == 1:\n",
    "            print(\"三次输入失败，请1小时后再来尝试\")\n",
    "        else:\n",
    "            print(\"账号不存在或密码不正确\")\n",
    "            print(\"您还有\"+str(i-1)+\"次尝试的机会\") # str强制将int转换成str\n",
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "b918314c",
   "metadata": {},
   "source": [
    "## 格式化输出\n",
    "\n",
    ">1. 字符串拼接\n",
    ">2. 占位符\n",
    ">3. format()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "02e903e1",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "姓名：Jack\n",
      "年龄：24\n",
      "工作：it\n",
      "收入：24000\n",
      "地区：深圳\n",
      "-----INFO OF Jack-----\n",
      "年龄：24\n",
      "工作：it\n",
      "收入：24000\n",
      "地区：深圳\n"
     ]
    }
   ],
   "source": [
    "# 用户注册系统 方法一：字符串拼接\n",
    "name = input(\"姓名：\")\n",
    "age = input(\"年龄：\")\n",
    "job = input(\"工作：\")\n",
    "salary = input(\"收入：\")\n",
    "regn = input(\"地区：\")\n",
    "\n",
    "info = '''-----INFO OF '''+ name +'''-----'''+'''\n",
    "年龄：'''+age+'''\n",
    "工作：'''+job+'''\n",
    "收入：'''+salary+'''\n",
    "地区：'''+reg\n",
    "\n",
    "print(info)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "38ed4ae4",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on method raw_input in module ipykernel.kernelbase:\n",
      "\n",
      "raw_input(prompt='') method of ipykernel.ipkernel.IPythonKernel instance\n",
      "    Forward raw_input to frontends\n",
      "    \n",
      "    Raises\n",
      "    ------\n",
      "    StdinNotImplementedError if active frontend doesn't support stdin.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(input)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "003e7c45",
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "年龄24\n",
      "24 <class 'str'>\n"
     ]
    }
   ],
   "source": [
    "# input作为用户输入，其都以字符串形式返回\n",
    "age = input(\"年龄\")\n",
    "print(age,type(age))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "id": "193b7062",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "姓名：jack\n",
      "年龄：24\n",
      "工作：服务业\n",
      "收入：25000\n",
      "地区：深圳\n",
      "-----INFO OF jack-----\n",
      "年龄：24\n",
      "工作：服务业\n",
      "收入：25000\n",
      "地区：深圳\n"
     ]
    }
   ],
   "source": [
    "# 用户注册系统 方法二： 占位符 %s，依次有序输入\n",
    "name = input(\"姓名：\")\n",
    "age = int(input(\"年龄：\")) # 强制将 str 转换成 int\n",
    "job = input(\"工作：\")\n",
    "salary = input(\"收入：\")\n",
    "reg = input(\"地区：\")\n",
    "\n",
    "info = '''-----INFO OF %s-----\n",
    "年龄：%s\n",
    "工作：%s\n",
    "收入：%s\n",
    "地区：%s'''%(name,age,job,salary,reg)\n",
    "print(info)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "id": "d15accb5",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "姓名：李华\n",
      "年龄：28\n",
      "工作：教育\n",
      "收入：9000\n",
      "地区：广州\n",
      "-----INFO OF 李华-----\n",
      "姓名：李华\n",
      "年龄：28\n",
      "工作：教育\n",
      "收入：9000\n",
      "地区：广州\n"
     ]
    }
   ],
   "source": [
    "# 用户注册系统 方法三：format() 格式化输出函数，参数传递，不需要考虑位置\n",
    "name = input(\"姓名：\")\n",
    "age = int(input(\"年龄：\")) # 强制将 str 转换成 int\n",
    "job = input(\"工作：\")\n",
    "salary = input(\"收入：\")\n",
    "reg = input(\"地区：\")\n",
    "\n",
    "info = '''-----INFO OF {姓名}-----\n",
    "姓名：{姓名}\n",
    "年龄：{年龄}\n",
    "工作：{工作}\n",
    "收入：{收入}\n",
    "地区：{地区}'''.format(年龄 = age,姓名 = name,工作 = job,收入 = salary,地区 = reg)\n",
    "print(info)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1b9930a3",
   "metadata": {},
   "source": [
    "## 课后练习\n",
    "### 要求：\n",
    "\n",
    ">1. 运行程序后，让用户输入支付宝余额，然后打印我们的商品列表给用户。\n",
    ">2. 让用户输入商品编号进行商品的购买。\n",
    ">3. 用户选择商品后，检查用户的余额是否够，若够则直接扣款，不够则提醒用户。\n",
    ">4. 用户可以随时退出购买，推出时打印用户已购买的商品和支付宝余额。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "5133974d",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 定义商品列表\n",
    "product_list =[\n",
    "    ('黑笔',5),\n",
    "    ('练习本',10),\n",
    "    ('文具盒',20)\n",
    "]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "84b28360",
   "metadata": {
    "scrolled": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入你的金额（整数）10\n"
     ]
    }
   ],
   "source": [
    "# 用户输入金额\n",
    "Money = input(\"请输入你的金额（整数）\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "6fe39138",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 判断用户输入的是否为数字\n",
    "if Money.isdigit():\n",
    "    Money = int(Money) # 强制转化为int\n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "f674f869",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 ('黑笔', 5)\n",
      "2 ('练习本', 10)\n",
      "3 ('文具盒', 20)\n"
     ]
    }
   ],
   "source": [
    "for i in product_list:\n",
    "    print(product_list.index(i)+1,i)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "1550b214",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入您需要购买的商品编号：2\n"
     ]
    }
   ],
   "source": [
    "# 用户输入的商品编号\n",
    "user_choice = input(\"请输入您需要购买的商品编号：\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "bcff06b2",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 判断用户输入的商品编号是否为数字\n",
    "if user_choice.isdigit():\n",
    "    user_choice = int(user_choice)\n",
    "    # 判断用户输入的数字是否超出商品范围\n",
    "    if user_choice "
   ]
  }
 ],
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